Answer:
1. 21/22
2. -37/12
3. 109/60
4. 5/12
5. 24/7
Explanation:
1.
12/11 ÷ 8/7 =
= 12/11 * 7/8
= 84/88
= 21/22
2.
11/12 - 8/2 =
= 11/12 - 48/12
= -37/12
3.
12/5 - 7/12 =
= 144/60 - 35/60
= 109/60
4.
4/12 ÷ 8/10 =
= 1/3 ÷ 4/5
= 1/3 * 5/4
= 5/12
5.
8/7 ÷ 3/9 =
= 8/7 ÷ 1/3
= 8/7 * 3/1
= 24/7
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